<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        th,td{
           border: 2px solid #000;
           padding: 20px;
           font-size: 24px;
        }
        th{
            width: 20%;
        }
        #free{
            background-color: red;

        }
        table{
            border-collapse: collapse;
            
        }
    </style>
    <script src="bingo.js"></script>
</head>
<body>
    <h1>创建一个Bingo</h1>
    <table>
        <tr>
            <th>B</th>
            <th>I</th>
            <th>N</th>
            <th>G</th>
            <th>O</th>
        </tr>
        <tr>
            <td id="square0"></td>
            <td id="square1"></td>
            <td id="square2"></td>
            <td id="square3"></td>
            <td id="square4"></td>
        </tr>
        <tr>
            <td id="square5"></td>
            <td id="square6"></td>
            <td id="square7"></td>
            <td id="square8"></td>
            <td id="square9"></td>
        </tr>
        <tr>
            <td id="square10"></td>
            <td id="square11"></td>
            <td id="free">free</td>
            <td id="square12"></td>
            <td id="square13"></td>
        </tr>
        <tr>
            <td id="square14"></td>
            <td id="square15"></td>
            <td id="square16"></td>
            <td id="square17"></td>
            <td id="square18"></td>
        </tr>
        <tr>
            <td id="square19"></td>
            <td id="square20"></td>
            <td id="square21"></td>
            <td id="square22"></td>
            <td id="square23"></td>
        </tr>
    </table>
    
</body>
</html>